Grumpy cat, born in Arizona in 2012 quickly became an internet cat celebrity for her adorable “grumpy” looking facial expression. According to Wikipedia, Grumpy Cat’s (real name is Tardar Sauce) expression is due to feline dwarfism and an underbite. Grumpy Cat’s endeavors have included a website, Facebook, Twitter, YouTube, several appearances and a following of around 2.4 million on Instagram. Although Grumpy Cat appears grumpy, she is actually a very normal cat according to her owner. In addition to social media and appearances Grumpy Cat has licensed merchandise including t-shirts, mugs, stuffed toys and a book.

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